Appeal deadline questions after an unemployment denial

My claim was denied after 25 weeks of waiting, and the letter says I have a short window to appeal. I have read a lot of threads here and could not find my exact situation. I have not done a hearing before and I am nervous. Did you bring documents or only talk?

Thanks for writing this out. I went through something close to it 2 months ago, and it settled down once I kept a simple log of every call and form.